check value in dictionary python code example
Example 1: python check if value exists in any key
>>> d = {'1': 'one', '3': 'three', '2': 'two', '5': 'five', '4': 'four'}
>>> 'one' in d.values()
True
Example 2: how to know if a key is in a dictionary python
dict = {"key1": 1, "key2": 2}
if "key1" in dict:
Example 3: python dictionary get value if key exists
val = dict.get(key , defVal) # defVal is a default value if key does not exist